Did you mean 2-3 clocks?  It wasn't anything near 23 clocks on the Z80s I used.

I am fairly sure that there was a one byte prefix to specify the index register.

Unfortunately I packed up my Z80 manual last night.  If I remember I will check these 
after I move.

-----Original Message-----
From: Alan Cox [mailto:[EMAIL PROTECTED]
Sent: Thursday, August 07, 2003 3:38 PM
To: [EMAIL PROTECTED]
Subject: Re: big and little endian


On Iau, 2003-08-07 at 18:58, Fargusson.Alan wrote:
> But if you use an index register instead of HL you could use an offset.  Now the 
> 8080 didn't have index registers, so this may have been an issue on these.

At a cost of 2 bytes and if I remember rightly going up to 23 clocks
with the prefix

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